CN113914348B

CN113914348B - Movable modular assembly type tower crane steel bearing platform and mounting method

Info

Publication number: CN113914348B
Application number: CN202111228383.4A
Authority: CN
Inventors: 靳慧; 焦海涵; 王立彬
Original assignee: Southeast University
Current assignee: Southeast University
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-04-29
Anticipated expiration: 2041-10-21
Also published as: CN113914348A

Abstract

The invention discloses a movable modularized assembly type tower crane steel bearing platform and an installation method. Each bearing platform module comprises an upper cover plate and a lower supporting plate, wherein angle supports, side supports, inner supports and annular supports are arranged between the upper cover plate and the lower supporting plate and used for supporting and reinforcing, and a fixing ring for positioning and fixing is arranged at the lower part of the lower supporting plate. The steel pipe pile penetrates through the fixing ring to be connected with the annular support in the bearing platform module. The sliding part is connected with the side support in the bearing platform module through the spiral supporting rod, and the tower crane foundation section supporting legs are respectively installed and fixed in the sliding part in the middle of the four bearing platform modules. The number of the bearing platform modules can be freely adjusted according to engineering requirements; the field installation is rapid, and the construction efficiency is high; the structure has high rigidity and good safety after installation; the position of the member can be adjusted according to the size of the actual tower crane foundation section, and the adaptability is high.

Description

Movable modular assembly type tower crane steel bearing platform and mounting method

Technical Field

The invention relates to the technical field of tower crane steel bearing platforms of civil engineering, in particular to a movable modular assembly type tower crane steel bearing platform and an installation method.

Background

With the continuous acceleration of urban construction in China, the tower crane meeting the function of high-altitude transportation on a construction site becomes an essential main construction machine in the modern construction industry. Particularly, under the promotion of the fabricated building, the quantity and the quality of components needing to be hoisted during construction are greatly increased, and the application of the tower crane plays a vital role in accelerating the construction progress and reducing the construction cost.

The tower crane bearing platform is used as an important component of the tower crane, plays a role in fixing the tower crane and bearing upper load in the using process, and the reliability of the tower crane bearing platform directly influences the safety of the construction process. At present, a conventional tower crane bearing platform usually adopts a reinforced concrete bearing platform foundation, and a concrete pile foundation is arranged at the lower part of the bearing platform. The bearing platform has the following defects: (1) the construction process of the bearing platform is complex, and relates to a plurality of procedures such as steel bar binding, formwork erecting, concrete casting and the like, and the construction period is long; (2) the erection of the bearing platform needs a large amount of steel bars and concrete, the investment cost is huge, ecological transformation cannot be carried out after the bearing platform is dismantled, and the environmental pollution is large; (3) for high-rise buildings, the height of the bearing platform is close to that of the basement, and the bearing platform and the basement are easy to cause construction difficulty if crossed construction is carried out.

Therefore, a novel tower crane bearing platform which is convenient and quick to install, can be recycled, does not influence building construction and is high in bearing capacity is urgently needed in a construction site, and the movable modular assembly type tower crane steel bearing platform provided by the scheme can meet the requirements.

Disclosure of Invention

The purpose of the invention is as follows: the quick assembly and disassembly of the tower crane bearing platform on the construction site are realized, the tower crane bearing platform can be recycled, and meanwhile, the bearing platform is required to be strong in bearing capacity, safe and reliable. Therefore, the movable modularized assembly type tower crane steel bearing platform and the installation method are provided, and the movable modularized assembly type tower crane steel bearing platform is used for completing the construction of the tower crane bearing platform.

The technical scheme is as follows: in order to achieve the purpose, the invention adopts the technical scheme that:

a movable modular assembly type tower crane steel bearing platform is characterized in that the tower crane steel bearing platform at least comprises four bearing platform modules which form a square structure together through connecting pieces and high-strength bolts, each bearing platform module comprises an upper cover plate and a lower supporting plate, and an angle support, a side support, an inner support and an annular support for supporting and reinforcing are arranged between the upper cover plate and the lower supporting plate; the tower crane foundation section support leg fixing device is characterized in that a rectangular groove in an oblique diagonal direction is formed in the right lower portion of the upper cover plate, a steel pipe pile penetrates through a fixing ring on the lower portion of the lower supporting plate to be connected with an annular support in the bearing platform module, a tower crane foundation section support leg is fixed in a sliding piece and penetrates through the rectangular groove in the upper cover plate, and the sliding piece is connected with a side support in the bearing platform module through a spiral support rod.

Furthermore, the upper cover plate and the lower support plate are two square steel plates with the same size, and a round hole for the steel pipe pile to pass through is formed in the middle of the lower support plate.

Furthermore, the angle support, the side support, the inner support and the annular support are connected with the upper cover plate and the lower supporting plate through high-strength bolts; the corner supports are arranged at four corners of the bearing platform module, each corner support is formed by combining three equally-spaced horizontal steel plates I, two vertical steel plates I which are perpendicular to each other and a vertical L-shaped steel plate, and bolt holes for connecting adjacent steel bearing platforms are formed in the L-shaped steel plates; the side supports are arranged on four sides of the bearing platform module and two sides of the sliding part, each side support is composed of three equally-spaced horizontal steel plates II, a vertical steel plate II positioned in the middle and a side steel plate positioned in the vertical direction of the side edge, and bolt holes for connecting adjacent steel bearing platforms are formed in the side steel plates; the inner supports are arranged in the bearing platform module, and each inner support is formed by combining three equally-spaced horizontal steel plates, three equally-spaced vertical steel plates and an inner steel plate positioned in the middle vertical direction; the annular support is arranged in the middle of each bearing platform module, the annular support is formed by combining three annular equidistant annular steel plates, four radial steel plates and an inner annular steel cylinder, and bolt holes convenient for being connected and fixed with the steel pipe pile are formed in four oblique directions of the annular steel cylinder in advance.

Furthermore, fixed ring is located the lower part intermediate position of bottom plate, is formed by the combination of four radial stiffening steel plates of the fixed steel cylinder that the swivel plane is the shape of falling L and being located its outside, fixed ring is connected with bottom plate and the annular support on upper portion through high strength bolt.

Further, the slider comprises an outer sliding cylinder and an inner sliding cylinder, the cross section of the outer sliding cylinder is hollow square, four corners of the inner sliding cylinder are connected with the middle points of four sides of the outer sliding cylinder in an inner mode, the middle of the side edge of the outer sliding cylinder is provided with a mounting groove, the top and the bottom of the outer sliding cylinder are provided with fixing plates, and tower crane foundation support legs are inserted into the inner sliding cylinder in advance.

Furthermore, the spiral support rods are arranged on two sides of the sliding piece and consist of inner spiral rods and outer spiral rods; the utility model discloses a sliding part, including the square spiral end plate, the internal screw pole is welded outside the slip section of thick bamboo in advance and slides to the solid steel drum of side, the external screw pole is the hollow steel drum that one end and square spiral end plate are fixed, it is fixed through screw thread intermeshing between internal screw pole and the external screw pole, make spiral vaulting pole arbitrary length that can stretch out and draw back through rotatory screw thread, thereby the spiral end plate utilizes high strength bolt to connect the slip of slider to fixed with the collateral branch to the collateral branch bracing.

Furthermore, the connecting sheet is a steel sheet with arc chamfers at two ends of the rectangle, and the two connecting sheets clamp the upper cover plate/lower supporting plate of the two steel bearing platforms respectively through high-strength bolts during connection to realize connection between the steel bearing platforms.

Furthermore, the bearing platform module also comprises a positioning ring which is arranged at the bolt holes on the periphery of the lower part of the upper cover plate and the upper part of the lower supporting plate.

A method for installing a movable modularized assembly type tower crane steel bearing platform is realized based on the movable modularized assembly type tower crane steel bearing platform, and is characterized by comprising the following steps:

1. determining the number of required bearing platform modules and the soil penetration depth of the steel pipe pile in advance according to the soil quality condition of a bearing layer on a construction site and the required installation number of standard sections of the tower crane, and pressing the steel pipe pile into the preset soil layer depth;

2. fixing the annular support and the fixing ring on the lower supporting plate by using high-strength bolts respectively, then penetrating the steel pipe pile through a round hole in the middle of the lower supporting plate, and connecting and fixing the steel pipe pile and the annular support by using the high-strength bolts;

3. after the sliding part is adjusted to a position suitable for fixing the tower crane foundation section support leg, the sliding part and the matched side support are fixed with the lower supporting plate, and the upper cover plate is hoisted to a specified position; inserting the tower crane foundation section support leg into the inner sliding barrel of the sliding part, and rotating the spiral support rod to the position where the spiral support rod and the side support are connected with each other through the high-strength bolt and then connecting the spiral support rod with the side support;

4. respectively penetrating high-strength bolts through bolt holes and fixing rings on the peripheries of an upper cover plate and a lower supporting plate, and connecting and fixing the upper cover plate/the lower supporting plate of two adjacent bearing platform modules by using each group of two connecting sheets;

5. connecting and fixing the rest corner supports, side supports and inner supports with an upper cover plate and a lower supporting plate by high-strength bolts respectively, and connecting the side supports close to each other between the adjacent bearing platform modules by the high-strength bolts;

and the whole movable modularized assembly type tower crane steel bearing platform is installed.

Compared with the prior art, the invention has the following beneficial effects:

compared with the prior art, the movable modular assembly type tower crane steel bearing platform is convenient and quick to install, and construction of an adjacent building is not affected. During installation, the number of the bearing platform modules and the soil penetration depth of the steel pipe pile can be freely adjusted according to actual needs, and the installation freedom degree is high. The steel bearing platform after being installed has high bearing capacity and good stability, and the whole structure is safe and reliable. All components of the steel bearing platform can be recycled, and the environment can be better protected.

Drawings

FIG. 1 is a schematic structural diagram of a single bearing platform module of a movable modular assembly type tower crane steel bearing platform.

FIG. 2 is a schematic diagram of the connection of four bearing platform modules of the movable modular assembly type tower crane steel bearing platform.

FIG. 3 is a schematic diagram of the internal structure of a single bearing platform module of the movable modular assembly type tower crane steel bearing platform.

Fig. 4 is a schematic view of the angle support of the mobile modular assembly tower crane steel bearing platform of the present invention.

FIG. 5 is a schematic side support view of a mobile modular assembly tower crane steel cap of the present invention.

Fig. 6 is a schematic diagram of the internal support of the movable modular fabricated tower crane steel bearing platform of the present invention.

FIG. 7 is a schematic view of the ring support and the ring retainer of the movable modular assembly tower crane steel bearing platform of the present invention.

FIG. 8 is a schematic diagram of the sliding member and the spiral brace of the movable modular assembled tower crane steel bearing platform of the present invention.

Fig. 9 is a cross-sectional view of the spiral brace of the mobile modular assembly tower crane steel bearing platform of the present invention.

Fig. 10 is a schematic view of the slide connection of the mobile modular assembly tower crane steel bearing platform of the present invention.

FIG. 11 is a schematic view of the connection between bearing platforms of the movable modular assembly type tower crane steel bearing platform.

In the figure: 1 is an upper cover plate, 2 is a lower supporting plate, 3 is an angle support, 4 is a side support, 5 is an inner support, 6 is an annular support, 7 is a fixing ring, 8 is a sliding piece, 9 is a spiral supporting rod, 10 is a tower crane foundation section supporting leg, 11 is a high-strength bolt, 12 is a connecting piece, 13 is a bolt hole, 14 is a positioning ring, and 15 is a steel pipe pile; 1-1 is a rectangular groove; 2-1 is a round hole; 3-1 is a horizontal steel plate I, 3-2 is a vertical steel plate I, and 3-3 is an L-shaped steel plate; 4-1 is a horizontal steel plate II, 4-2 is a vertical steel plate II, and 4-3 is a side steel plate; 5-1 is a horizontal steel plate III, 5-2 is a vertical steel plate, and 5-3 is an inner steel plate; 6-1 is an annular steel plate, 6-2 is a radial steel plate, and 6-3 is an annular steel cylinder; 7-1 is a fixed steel cylinder, and 7-2 is a stiffening steel plate; 8-1 is an outer sliding cylinder, 8-2 is an inner sliding cylinder, 8-3 is a fixing plate, and 8-4 is an installation groove; 9-1 is an internal screw rod, 9-2 is an external screw rod, 9-3 is a screw thread, and 9-4 is a screw end plate.

Detailed Description

The present invention is further illustrated by the following description in conjunction with the accompanying drawings and the specific embodiments, it is to be understood that these examples are given solely for the purpose of illustration and are not intended as a definition of the limits of the invention, since various equivalent modifications will occur to those skilled in the art upon reading the present invention and fall within the limits of the appended claims.

The invention discloses a movable modular assembly type tower crane steel bearing platform which is arranged on the periphery of a building to be built, and at least four bearing platform modules form a square structure together through connecting sheets 12 and high-strength bolts 11 in actual installation, as shown in figure 2.

As shown in fig. 1 and 3, each of the bearing platform modules comprises an upper cover plate 1 and a lower supporting plate 2, and an angle support 3, a side support 4, an inner support 5 and an annular support 6 for enhancing the rigidity of the bearing platform are arranged between the upper cover plate 1 and the lower supporting plate 2. The lower part of the lower supporting plate 2 is also provided with a fixing ring 7 used for positioning the steel pipe pile 15, so that the steel pipe pile 15 can penetrate through the fixing ring 7 to be connected with the annular support 6 installed in the steel bearing platform, and one steel pipe pile 15 is arranged below each bearing platform module. Slider 8 installs inside the cushion cap module for installation and fixed tower crane foundation festival stabilizer blade 10, slider 8 is connected through spiral brace 9 and the inside side support 4 of cushion cap module.

As shown in figure 1, the upper cover plate 1 and the lower supporting plate 2 are two square thick steel plates with the same size, and the thickness of the steel plates is ensured to prevent the structure from being damaged due to excessive deformation when stressed. The rectangular groove 1-1 in the diagonal direction is formed in the lower right of the upper cover plate 1 and used for installing the sliding piece 8, and the width of the rectangular groove 1-1 is the same as that of the sliding piece 8, so that the sliding piece 8 can freely slide in the rectangular groove 1-1 during installation and positioning, and the installation requirements of tower crane foundation section support legs 10 in different sizes are met. The middle part of the lower supporting plate 2 is provided with a round hole 2-1 for the steel pipe pile 15 to pass through, and the diameter of the round hole 2-1 is the same as the outer diameter of the steel pipe pile 15. Bolt holes 13 are also formed in the upper cover plate 1 and the lower supporting plate 2 in advance, so that the upper cover plate and the lower supporting plate can be conveniently connected with other components through high-strength bolts 11.

As shown in fig. 3-7, the angle brace 3, the side brace 4, the inner brace 5 and the ring brace 6 are all arranged inside the bearing platform module, have the same height, and are connected with the upper cover plate 1 and the lower supporting plate 2 through high-strength bolts 11, so as to play a role in supporting the steel bearing platform. The angle supports 3 are arranged at four corners of the steel bearing platform and are formed by welding and combining three equally-spaced horizontal steel plates 3-1, two vertical steel plates 3-2 which are mutually vertical and a vertical L-shaped steel plate 3-3. The side supports 4 are arranged on four sides of the bearing platform module and two sides of the sliding piece 8 and are formed by welding and combining three equally-spaced horizontal steel plates 4-1, a vertical steel plate 4-2 positioned in the middle and a side steel plate 4-3 positioned in the vertical direction of the side edge. Bolt holes 13 are formed in the L-shaped steel plates 3-3 of the angle supports 3 and the side steel plates 4-3 of the side supports 4 in advance, and finally high-strength bolts 11 penetrate through the L-shaped steel plates 3-3 and the side steel plates 4-3 of the adjacent steel bearing platforms to connect the bearing platform modules during installation. The inner supports 5 are arranged in four forward and four oblique areas in the bearing platform module and are formed by welding and combining three equidistant horizontal steel plates three 5-1, three equidistant vertical steel plates 5-2 and an inner steel plate 5-3 positioned in the middle vertical direction. The annular support 6 is arranged in the middle of the bearing platform module and is formed by welding and combining three annular equal-interval annular steel plates 6-1, four radial steel plates 6-2 perpendicular to the circumference and an inner annular steel cylinder 6-3. The inner diameter of the annular steel cylinder 6-3 is the same as the outer diameter of the steel pipe pile 15, and bolt holes 13 are formed in the four oblique directions of the annular steel cylinder 6-3 in advance, so that the annular steel cylinder is convenient to connect and fix with the steel pipe pile 15.

As shown in fig. 7, the fixing ring 7 is located at a lower circular hole 2-1 of the lower supporting plate 2 and is formed by welding and combining a fixing steel cylinder 7-1 with an inverted L-shaped rotating surface and four radial right-angle pentagonal stiffening steel plates 7-2 located outside the fixing steel cylinder 7-1, and the inner diameter of the fixing steel cylinder 7-1 is the same as the outer diameter of the steel pipe pile 15. The fixing ring 7 is connected with the lower supporting plate 2 and the annular support 6 on the upper portion through the high-strength bolt 11, and plays a role in positioning and fixing the steel pipe pile 15.

As shown in fig. 8 and 10, the sliding member 8 is formed by combining an outer sliding cylinder 8-1 and an inner sliding cylinder 8-2, the cross section of which is hollow and square, four corners of the inner sliding cylinder 8-2 are connected with the middle points of four sides of the outer sliding cylinder 8-1, and an included angle of 45 degrees is formed between the planes of the four sides, and the tower crane foundation section supporting legs 10 and the plane of the rectangular groove 1-1 form an included angle of 45 degrees in actual use. The top and the bottom of two sides of the outer sliding cylinder 8-1 are provided with fixing plates 8-3, and the middle part of the side is provided with an installation groove 8-4 which is convenient for the installation and the fixation of the inner sliding cylinder 8-2 and the tower crane foundation section support foot 10. The sliding part 8 can slide in the rectangular groove 1-1, and the aim is to meet the installation of the tower crane foundation section support legs 10 with different support leg intervals. During actual installation, the tower crane foundation section support legs 10 are inserted into the inner sliding cylinders 8-2 in advance, when the tower crane foundation section support legs 10 slide to the positions suitable for installation, the fixing plates 8-3 are fixedly connected with the upper cover plate 1 and the lower supporting plate 2 through high-strength bolts 11, and the spiral support rods 9 are fixedly connected with the side supports 4 at the two ends of the rectangular groove 1-1.

As shown in fig. 9, the screw stay 9 is composed of an inner screw 9-1 and an outer screw 9-2, and is provided at both sides of the sliding member 8. The inner screw rod 9-1 is welded on the sliding side surface of the outer sliding cylinder 8-1 in advance and is a steel solid cylinder. The external screw rod 9-2 is a steel hollow cylinder, and the two are mutually meshed and fixed through the external part of the internal screw rod 9-1 and the internal thread 9-3 of the external screw rod 9-2. The other end of the outer screw rod 9-2 is connected with a square screw end plate 9-4 for fixing with the side support 4. The inner spiral rod 9-1 and the outer spiral rod 9-2 can be stretched to any length by rotating the threads 9-3, and after the inner spiral rod and the outer spiral rod rotate to meet the installation requirements of the tower crane foundation section support leg 10, the spiral end plate 9-4 is connected with the side steel plate 4-3 of the side support 4 through the high-strength bolt 11, so that the sliding direction of the sliding piece 8 is fixed.

As shown in fig. 11, a connecting piece 12 and a positioning ring 14 are further included for connection. The connecting piece 12 is a steel sheet with arc chamfers at two ends of a rectangle and is used for respectively connecting and fixing the upper cover plate 1 and the lower supporting plate 2 of the two steel bearing platforms. The positioning ring 14 is a steel ring, the inner diameter of the ring is the same as the diameter of the bolt holes 13, and the positioning ring is arranged at the bolt holes 13 around the lower part of the upper cover plate 1 and the upper part of the lower supporting plate 2 to play a role in enhancing and positioning the high-strength bolt 11 during connection. Bolt hole 13 has all been seted up in advance to all components mentioned in this patent, and high strength bolt 11 passes upper cover plate 1/bottom plate 2 and holding ring 14 when adjacent steel cushion cap connects, will be located the upper and lower every group two connection pieces 12 of upper cover plate 1/bottom plate 2 and press from both sides tightly the connection that realizes between the steel cushion cap.

The use of the present invention is described below with reference to fig. 1 to 11:

1. before construction, a designer needs to obtain a geological survey report of a construction site, know the construction height of a building and the number and quality of components required to be hoisted in the construction process, determine the number of required bearing platform modules and the soil penetration depth of the steel pipe piles 15 in advance according to the soil quality condition of a field bearing layer and the size and installation number of required tower crane standard joints, and sequentially press the required steel pipe piles 15 into a preset soil layer depth by using a safe and reliable pile pressing technology, wherein the process needs to ensure that the construction of adjacent buildings is not influenced.

2. After the steel pipe pile 15 is pressed into the preset depth, the annular support 6 and the fixing ring 7 are fixed on the upper part and the lower part of the middle circular hole 2-1 of the lower supporting plate 2 in advance by the high-strength bolt 11 respectively. And then, hoisting the lower supporting plate 2 together with the annular support 6 and the fixing ring 7 which are installed on the lower supporting plate to an installation position and dropping so that the steel pipe pile 15 can penetrate through the circular hole 2-1 in the middle of the lower supporting plate 2, and connecting and fixing the steel pipe pile 15 and the annular support 6 by using the high-strength bolt 11, so that the connection of one steel pipe pile 15 and the bearing platform module is completed.

3. After the sliding part 8 is adjusted to a position where the tower crane foundation section support leg 10 is fixed, the sliding part 8 and the matched side support 4 are fixed with the lower supporting plate 2, and the upper cover plate 1 is lifted to a pre-installation position and then is provided with a temporary support for fixation; inserting the tower crane foundation section support leg 10 into the inner sliding cylinder 8-2 of the sliding part 8, screwing the spiral support rod 9 to a proper length to enable the spiral end plate 9-4 to be tightly propped against the side steel plate 4-3 of the side support 4, and connecting the side steel plate with the side support 4 through the high-strength bolt 11, so that the connection of the tower crane foundation section support leg 10 and the bearing platform module is completed.

4. Each group of two connecting sheets 12 are respectively placed at the upper part and the lower part of the bolt holes 13 and the positioning rings 14 around the upper cover plate 1/the lower supporting plate 2, the high-strength bolts 11 penetrate through the connecting sheets 12 and the bolt holes 13 and the positioning rings 14 clamped by the connecting sheets 12, and the upper cover plate 1/the lower supporting plate 2 of two adjacent bearing platform modules are connected and fixed by the upper connecting sheet 12 and the lower connecting sheet 12.

5. The corner supports 3, the side supports 4, the inner supports 5 and the annular supports 6 are respectively placed at designated positions in each bearing platform module, then temporary supports for supporting the upper cover plate 1 are removed, high-strength bolts 11 penetrate through bolt holes 13 which are preset in the component to respectively connect and fix the component with the lower supporting plate 2 and the upper cover plate 1, meanwhile, side steel plates 4-3 of the side supports 4 which are close to each other among the bearing platform modules are connected through the high-strength bolts 11, and the connection is from inside to outside, so that omission is prevented.

6. During installation of the steel bearing platform, the alignment and leveling are carried out by using auxiliary equipment such as a laser leveling instrument. After the steel bearing platform is erected, a static load test is carried out firstly, whether the displacement generated by the top of the steel pipe pile meets the requirement or not is recorded, and the phenomenon that the steel bearing platform generates uneven settlement and even causes serious instability damage due to insufficient bearing capacity is avoided.

The modular assembly type steel bearing platform is convenient to install and construct, improves the construction efficiency, can be combined into various forms according to construction requirements when being actually used, has good safety, can be recycled after being used, and has good economic and technical values.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims

1. The utility model provides a portable modularization assembled tower crane steel cushion cap which characterized in that: the tower crane steel bearing platform is characterized in that a square structure is formed by at least four bearing platform modules through connecting pieces (12) and high-strength bolts (11), each bearing platform module comprises an upper cover plate (1) and a lower supporting plate (2), and an angle support (3), a side support (4), an inner support (5) and an annular support (6) for supporting and reinforcing are arranged between the upper cover plate (1) and the lower supporting plate (2); a rectangular groove (1-1) in the diagonal direction is formed in the lower right of the upper cover plate (1), a steel pipe pile (15) penetrates through a fixing ring (7) at the lower part of the lower supporting plate (2) to be connected with an annular support (6) in the bearing platform module, a tower crane foundation section support leg (10) is fixed in a sliding piece (8) and penetrates through the rectangular groove (1-1) in the upper cover plate (1), and the sliding piece (8) is connected with a side support (4) in the bearing platform module through a spiral support rod (9);

the sliding part (8) consists of an outer sliding cylinder (8-1) and an inner sliding cylinder (8-2) with hollow and square cross sections, four corners of the inner sliding cylinder (8-2) are connected with the middle points of four sides of the outer sliding cylinder (8-1) in an inner mode, the middle of the side edge of the outer sliding cylinder (8-1) is provided with a mounting groove (8-4), the top and the bottom of the mounting groove are provided with fixing plates (8-3), and tower crane foundation section support legs (10) are inserted into the inner sliding cylinder (8-2) in advance;

the spiral support rods (9) are arranged on two sides of the sliding piece (8) and consist of inner spiral rods (9-1) and outer spiral rods (9-2); the inner spiral rod is a solid steel cylinder welded on an outer sliding cylinder (8-1) in advance and slides to the side face, the outer spiral rod (9-2) is a hollow steel cylinder with one end fixed with a square spiral end plate (9-4), the inner spiral rod (9-1) and the outer spiral rod (9-2) are mutually meshed and fixed through threads (9-3), the spiral support rod (9) can extend and retract in any length by rotating the threads (9-3), and the spiral end plate (9-4) is connected with the side support (4) through a high-strength bolt (11) so as to fix the sliding direction of the sliding part (8);

the angle support (3), the side support (4), the inner support (5) and the annular support (6) are connected with the upper cover plate (1) and the lower supporting plate (2) through high-strength bolts (11); the corner supports (3) are arranged at four corners of the bearing platform module, each corner support (3) is formed by combining three equally-spaced horizontal steel plates I (3-1), two mutually-perpendicular vertical steel plates I (3-2) and a vertical L-shaped steel plate (3-3), and bolt holes (13) for connecting adjacent bearing platform modules are formed in the L-shaped steel plates (3-3); the side supports (4) are arranged on four sides of the bearing platform module and two sides of the sliding piece (8), each side support (4) is formed by combining three equally-spaced horizontal steel plates II (4-1), a vertical steel plate II (4-2) located in the middle and a side steel plate (4-3) located in the vertical side edge, and bolt holes (13) used for being connected with the adjacent bearing platform module are formed in the side steel plates (4-3); the inner supports (5) are arranged in the bearing platform module, and each inner support (5) is formed by combining three equally-spaced horizontal steel plates III (5-1), three equally-spaced vertical steel plates (5-2) and one vertically-positioned inner steel plate (5-3) in the middle; the annular support (6) is arranged in the middle of each bearing platform module, the annular support (6) is formed by combining three annular equidistant annular steel plates (6-1), four radial steel plates (6-2) positioned in four radial directions and an inner annular steel cylinder (6-3), and bolt holes (13) convenient for being connected and fixed with the steel pipe pile (15) are formed in the four oblique directions of the annular steel cylinder (6-3) in advance.

2. The movable modular assembly tower crane steel bearing platform according to claim 1, characterized in that: the upper cover plate (1) and the lower supporting plate (2) are two square steel plates with the same size, and a round hole (2-1) for enabling the steel pipe pile (15) to penetrate through is formed in the middle of the lower supporting plate (2).

3. The movable modular assembly tower crane steel bearing platform according to claim 1, characterized in that: the fixing ring (7) is located in the middle of the lower portion of the lower supporting plate (2) and is formed by combining a fixing steel cylinder (7-1) with a rotating surface in an inverted L shape and four radial stiffening steel plates (7-2) located on the outer side of the fixing ring, and the fixing ring (7) is connected with the lower supporting plate (2) and the annular support (6) on the upper portion through high-strength bolts (11).

4. The movable modular assembly tower crane steel bearing platform according to claim 1, characterized in that: the connecting pieces (12) are steel sheets with arc chamfers at two ends of each rectangle, and the two connecting pieces (12) respectively clamp the upper cover plates (1)/the lower supporting plates (2) of the two bearing platform modules through the high-strength bolts (11) during connection to realize connection between the bearing platform modules.

5. The movable modular assembly tower crane steel bearing platform according to claim 1, characterized in that: the bearing platform module further comprises a positioning ring (14), and the positioning ring (14) is arranged at the bolt holes (13) on the periphery of the lower portion of the upper cover plate (1) and the upper portion of the lower supporting plate (2).

6. A method for installing a movable modular assembly type tower crane steel bearing platform, which is realized based on the movable modular assembly type tower crane steel bearing platform of claim 5, and is characterized by comprising the following steps:

1.1, determining the number of required bearing platform modules and the soil penetration depth of the steel pipe pile (15) in advance according to the soil quality condition of a bearing layer of a construction site and the required installation number of standard sections of a tower crane, and pressing the steel pipe pile (15) into a preset soil layer depth;

1.2, fixing the annular support (6) and the fixing ring (7) on the lower supporting plate (2) by using high-strength bolts (11) respectively, then penetrating the steel pipe pile (15) through a round hole (2-1) in the middle of the lower supporting plate (2), and connecting and fixing the steel pipe pile (15) and the annular support (6) by using the high-strength bolts (11);

1.3, after the sliding part (8) is adjusted to a position where a proper tower crane foundation section support leg (10) is fixed, fixing the sliding part (8) and the matched side support (4) with the lower supporting plate (2), and hoisting the upper cover plate (1) to a specified position; inserting the tower crane foundation section support leg (10) into an inner sliding cylinder (8-2) of a sliding part (8), and screwing a spiral stay bar (9) to the whole length of the spiral stay bar to enable the spiral stay bar to be connected with a side support (4) after the spiral stay bar is connected with the side support (4) through a high-strength bolt (11);

1.4, respectively penetrating high-strength bolts (11) through bolt holes (13) and positioning rings (14) around an upper cover plate (1) and a lower supporting plate (2), and connecting and fixing the upper cover plate (1)/the lower supporting plate (2) of two adjacent bearing platform modules by using each group of two connecting sheets (12);

1.5, connecting and fixing the rest corner supports (3), side supports (4) and inner supports (5) with an upper cover plate (1) and a lower supporting plate (2) by high-strength bolts (11), and simultaneously connecting the side supports (4) which are close to each other between the adjacent bearing platform modules with each other by the high-strength bolts (11);